The mightiest pillar that has been established to support the Faith of God is "learning and the use of the mind"

There are certain pillars which have been established as the unshakable supports of the Faith of God. The mightiest of these is learning and the use of the mind, the expansion of consciousness, and insight into the realities of the universe and the hidden mysteries of Almighty God. (‘Abdu’l-Baha, ‘Selections from the Writings of 'Abdu'l-Bahá’; The Compilation of Compilations, vol. I, Baha’i Education)